Difference between LandscapeGrass & Foliage

Hello,

I’m a beginner in Unreal Engine and I’m interesting in creating Foliage in UE4 (my current version is 4.16.1). My first attempt was with this tutorial:

This video explains how to create a LandscapeGrass object and how to use it with the “Landscape > Paint” Tool:

However, I have seen a lot of other tutorials about the Foliage Tab (next to the Landscape tab). I tried to use it, but now I wonder what is the difference between those 2 tools?

Thank you in advance for your answer.